What is the meaning of Shaker?

A person or thing that shakes, or by means of which something is shaken.

A variety of pigeon.

One who holds railroad spikes while they are hammered.

A musical percussion instrument filled with granular solids which produce a rhythmic sound when shaken.

A kind of straight-sided, stackable glass for beer, soda, etc.

cocktail shaker

cocktail shaker

Shaker

cocktail shaker

shaker

Source: wiktionary.org